Issued Patents 2020
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10746904 | Free-form surface lens, method of designing free-form surface lens, free-form surface mirror, method of designing free-form surface mirror, and projection type video display apparatus | Koji Hirata, Masahiko Yatsu, Yuki Matsumiya, Shuji Kato | 2020-08-18 |
| 10678017 | Projection image display device | Koji Hirata, Masahiko Yatsu, Shuji Kato, Yuki Matsumiya | 2020-06-09 |